Jesus tells Nicodemus, a Pharisee and Jewish ruler, that he must be "born again" to enter God's kingdom. Nicodemus does not understand how this is possible, thinking it means being physically born a second time. Jesus explains that it means being spiritually cleansed and regenerated by the Holy Spirit, not through physical birth or religious deeds. While Nicodemus was a respected teacher, Jesus implies he should understand this from Scripture but fails to recognize Jesus as the Son of God spoken of in the Scriptures who descended from heaven.